AKG K501, without a doubt. I sold them when I sold all my other audio stuff. I thought I was slipping down the slope just a bit too quickly in the world of head fidelity, so I purged everything before I became monstrous. I ended up using the money for collegiate activities. . . .
Anyhow, I've had a hard time getting back to the point where I was. It's sad. Though, it's all really just one big work in progress . . . I guess.